How can I implement performance logging in C++?

How can I implement performance logging in C++?

You can use libraries like <chrono> for timing and log the results to a file or console.

Can you show me a simple example of using <chrono>?

Sure! Here's a basic example:

#include <iostream>
#include <chrono>

void functionToMeasure() {
    // Simulate work
    for (int i = 0; i < 1000000; ++i);
}

int main() {
    auto start = std::chrono::high_resolution_clock::now();
    functionToMeasure();
    auto end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double> duration = end - start;
    std::cout << "Function took: " << duration.count() << " seconds" << std::endl;
    return 0;
}

What if I want to log the performance data to a file?

You can use file streams to write the performance data to a file. Here's how you can modify the example to log to a file.

Great! Can you provide that modified example?

Absolutely! Here's the modified code:

#include <iostream>
#include <chrono>
#include <fstream>

void functionToMeasure() {
    // Simulate work
    for (int i = 0; i < 1000000; ++i);
}

int main() {
    std::ofstream logFile("performance_log.txt");
    auto start = std::chrono::high_resolution_clock::now();
    functionToMeasure();
    auto end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double> duration = end - start;
    logFile << "Function took: " << duration.count() << " seconds" << std::endl;
    logFile.close();
    return 0;
}